1953495405 has 24 divisors (see below), whose sum is σ = 3388360248. Its totient is φ = 1041156096.

The previous prime is 1953495367. The next prime is 1953495433. The reversal of 1953495405 is 5045943591.

1953495405 is a `hidden beast` number, since 19 + 53 + 49 + 540 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 348531561 + 1604963844 = 18669^2 + 40062^2 .

It is not a de Polignac number, because 1953495405 - 2²⁰ = 1952446829 is a prime.

It is a super-2 number, since 2×1953495405² = 7632288594712228050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55909 + ... + 83861.

It is an arithmetic number, because the mean of its divisors is an integer number (141181677).

Almost surely, 2^1953495405 is an apocalyptic number.

1953495405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1953495405 is a deficient number, since it is larger than the sum of its proper divisors (1434864843).

1953495405 is a wasteful number, since it uses less digits than its factorization.

1953495405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29517 (or 29514 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The square root of 1953495405 is about 44198.3642796880. The cubic root of 1953495405 is about 1250.0790147386.

The spelling of 1953495405 in words is "one billion, nine hundred fifty-three million, four hundred ninety-five thousand, four hundred five".